Anthocyanin from flower petals

To whom it may concern,
My name is Matt Shipman, and I am a student at Linfield College in
McMinnville OR. I am currently conducting an experiment to extract
anthocyanin from flower petals in order to determine their absorbtion
spectrums. I have been searching the literature for relevant papers and
articles but so far I have found only one or two that I can use. Would
you be able to point me in the direction of some information, any ideas
will be greatly appreciated. If you can help me, please contact me at
the following email address:
mshipman at calvin.linfield.edu
Thank you for your time.
Sincerely
Matt Shipman